ParticleSystem.TrailModule.widthOverTrail

Description

The curve describing the width, of each trail point.

See Also: MinMaxCurve.

#pragma strict
private var ps: ParticleSystem;
private var curve: AnimationCurve = new AnimationCurve();
public var widthOverTrail: boolean = true;
function Start() {
	ps = GetComponent.<ParticleSystem>();
	var main: var = ps.main;
	main.startColor = new ParticleSystem.MinMaxGradient(Color.red, Color.yellow);
	main.startSize = new ParticleSystem.MinMaxCurve(0.01f, 1.0f);
	main.startLifetime = 1.5f;
	var trails: var = ps.trails;
	trails.enabled = true;
	curve.AddKey(0.0f, 1.0f);
	curve.AddKey(1.0f, 0.0f);
	var psr: var = GetComponent.<ParticleSystemRenderer>();
	psr.trailMaterial = new Material(Shader.Find("Sprites/Default"));
}
function Update() {
	var trails: var = ps.trails;
	if (widthOverTrail)
		trails.widthOverTrail = new ParticleSystem.MinMaxCurve(1.0f, curve);
	else
		trails.widthOverTrail = 1.0f;
}
function OnGUI() {
	widthOverTrail = GUI.Toggle(new Rect(25, 25, 200, 30), widthOverTrail, "Width over Trail");
}

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour
{
    private ParticleSystem ps;
    private AnimationCurve curve = new AnimationCurve();
    public bool widthOverTrail = true;

    void Start()
    {
        ps = GetComponent<ParticleSystem>();

        var main = ps.main;
        main.startColor = new ParticleSystem.MinMaxGradient(Color.red, Color.yellow);
        main.startSize = new ParticleSystem.MinMaxCurve(0.01f, 1.0f);
        main.startLifetime = 1.5f;

        var trails = ps.trails;
        trails.enabled = true;

        curve.AddKey(0.0f, 1.0f);
        curve.AddKey(1.0f, 0.0f);

        var psr = GetComponent<ParticleSystemRenderer>();
        psr.trailMaterial = new Material(Shader.Find("Sprites/Default"));
    }

    void Update()
    {
        var trails = ps.trails;
        if (widthOverTrail)
            trails.widthOverTrail = new ParticleSystem.MinMaxCurve(1.0f, curve);
        else
            trails.widthOverTrail = 1.0f;
    }

    void OnGUI()
    {
        widthOverTrail = GUI.Toggle(new Rect(25, 25, 200, 30), widthOverTrail, "Width over Trail");
    }
}